Lesson Three（2学时）Cellular Reproduction: Mitosis and Meiosis 教学目的：使学生掌握细胞的有丝分裂和无丝分裂的作用机理，有丝分裂和无丝分裂之间的区别和相同点。相关英语词汇以及主要用法。教学重点：有丝分裂和无丝分裂中相关的概念和功能，及相关英语词汇的掌握教学难点：专业英语词汇的记忆讲授方法：以学生翻译为主，老师讲解相关专业知识辅助学生理解授课时间：4月12日教学内容：
The Nucleus and ChromosomesThe cell nucleus is the main repository of genetic information. Within the nucleus are the chromosomes tightly coiled strands of DNA and clusters of associated proteins. Long stretches of the continuous DNA molecule wind around these clusters of proteins, or histones, forming beadlike complexes known as nucleosomes. More coiling and supercoiling produces a dense chromosome structure. Each long strand of DNA combines with histones and nonhistone proteins to make up the substance chromatin.细胞核是贮藏遗传信息的主要场所。DNA盘绕成螺旋线以及相关的成簇蛋白质。DNA螺旋线缠绕成簇的组蛋白形成珠链状的核小体。这些螺旋和超螺旋形成致密的染色体组结构。每个长链DNA与组蛋白和非组蛋白一起构成染色质物质。
A pictorial display of an organism's chromosomes in the coiled, condensed state is known as a karyotype. Karyotype reveal that in most cells all but sex chromosomes are present as two copies, referred to as homologous pairs. Non-sex chromosomes are called autosomes. Organisms whose cells contain two sets of parental chromosomes are called diploid; those with cells containing a single set of parental chromosomes are called haploid. 染色体致密的超螺旋状态我们称染色体组。除了性染色体外，大多数细胞的染色体组成对出现，称同源染色体对。非性染色体称常染色体。生物细胞含有两套父母本染色体的称二倍体；含有单套染色体的称单倍体。
The Cell CycleThe cell cycle is a regular sequence in which the cell grows, prepares for division, and divides to form two daughter cells, each of which then repeats the cycle. Such cycling in effect makes single-celled organisms immortal. Many cells in multicellular organisms, including animal muscle and nerve cells, either slow the cycle or break out of it altogether.在细胞生长过程中，细胞循环遵循特定程序，分裂准备，分裂成2个子细胞，子细胞再循环。此循环使得单细胞永生。多细胞生物中的许多细胞，包括动物肌肉和神经细胞，要么降低循环速度，要么同时分裂。
The normal cell cycle consists of four phases. The first three include G1, the period of normal metabolism; S phase, during which normal synthesis of biological molecules continues, DNA is replicated, and histones are synthesized; and G2, a brief period of metabolism and additional growth. Together the G1, S, and G2 phases are called interphase. The fourth phase of the cell cycle is M phase, the period of mitosis, during which the replicated chromosomes condense and move and the cell divides. It is believed that properties of the cell cytoplasm control the cell cycle, along with external stimulators and inhibitors such as chalones.
正常细胞循环由4个时期组成。头三期包括G1,正常新陈代谢；S期,正常新陈代谢同时，DNA 复制，组蛋白合成；G2 期，短期的新陈代谢和少许生长。G1, S, 和G2称分裂间期。最后是M期，有丝分裂期，复制的染色体组浓缩，移动并细胞分裂。据称是染色质控制了细胞循环，伴随外部激活因子和抑制因子如抑素。
Mitosis: Partitioning the Hereditary MaterialBiologists divide the mitotic cycle into four phases. At the beginning of prophase the chromosomes each consist of two highly condensed chromatids attached to each other at a centromere. As prophase ends and metaphase begins, the condensed chromosomes become associated with the spindle. Eventually the chromosomes become
arranged in a plane (called the metaphase plate) at a right angle to the spindle fibers. Next, during anaphase, the two sister chromatids of each chromosome split, and one from each pair is drawn toward each pole of the cell. During telophase nuclear envelopes begin to form around each set of chromosomes, and division of the cytoplasm takes place.生物学家将有丝分裂划分为4个阶段。分裂前期，高度浓缩的两个染色单体通过着丝粒连接在一起。在分裂前期后期和分裂中期前期，浓缩的染色体与纺锤体相连，最后以正确的角度排列在赤道板上。在分裂后期，两个姊妹单体分离，分别拽向细胞两极。在分裂末期，在每套染色体周围形成核膜，细胞质发生分裂。
As mitosis proceeds, the spindle microtubules play a crucial role in ensuring that both paired and separated chromatids move in the right directions at the proper times. Each half of the spindle forms as microtubules extend from each pole of a dividing cell to the region of the metaphase plate. During prophase, other microtubules, the centromeric fibers, extend outward from the spindle poles to structures on the chromosomes called kinetochores. During anaphase the fibers begin to shorten, and the chromatids begin to move apart.在有丝分裂过程中，是纺锤体微管确保了染色单体在适当时间以正确方向进行分离。纺锤体微管由两极向赤道板延伸。在分裂前期，其它微管，着丝粒纤维延伸到染色体的动粒。在分裂后期，纤维开始变短，染色单体分离。The spindle forms differently in plant and animal cells. In animals it is associated with centriole, while in plant and fungal cells spindle formation is associated with reions called microtubule organizing centers. 植物和动物细胞形成的纺锤体不同。动物细胞与中心粒相连，而在植物和真菌细胞中，纺锤体与微管组织中心的离子相连。
Cytokinesis: Partitioning the Cytoplasm胞质分裂：细胞质分离The division of the cell cytoplasm at the end of mitosis is called cytokinesis. In animal cells it takes place as a ring of actin filaments contracts around the cell equator, pinching the cell in two. In plant cells, which are bounded by a cell wall, cytokinesis involves the building of a new cell plate across the dividing cell at its equator. Cell wall material is then deposited in the region of the cell plate. 在动物细胞中，环形肌动蛋白丝延赤道板收缩而使细胞一分为二。在植物细胞中，在赤道板形成新的细胞板。
Meiosis: The Basis of Sexual ReproductionMeiosis is a special form of cell division that takes place in the reproductive organs that produce sex cells. Like mitosis, it takes place after DNA replication has occurred and involves two sequential nuclear divisions (meiosis I and meiosis Ⅱ). These divisions result in four daughter cells, each with half the number of chromosomes of the parent cell. The phenomenon of crossing over during meiosis results in exchanges of genetic information between chromosomes. Hence, the homologous chromosomes distributed to different progeny cells are not identical.减数分裂是性细胞分裂的特殊形式。如有丝分裂，它也是发生在DNA复制后并有连续的两个核分裂。产生4个子细胞，分别含有亲本一半的染色体数。
As in mitosis two chromatids exist for each chromosome at the beginning of prophase 1. During this phase the homologous chromosomes undergo synapsis, or pairing, which is brought about by a bridging structure of proteins and RNA called the synaptonemal complex. The homologous pairs stay together when they align on the metaphase plate. Unlike the anaphase of mitosis, however, during anaphase I the two chromatids of each chromosome stay joined at the centromere and move together to one of the two poles of the cell. It is this event that results in the halving of the chromosome number in the four daughter cells that result from meiosis.正如在有丝分裂中一样，两个同源染色单体通过蛋白质和RNA桥配对形成联会复合体。与有丝分裂不同的是，
每组染色体的两个染色单体连接在着丝点上并一起移向细胞两极的一级。由此而导致4个子细胞染色体数减半。During telophase I nuclear envelopes enclose the chromosomes in nuclei, and in most species cytokinesis (the first nuclear division) follows. The second nuclear division begins with metaphase Ⅱ, in which the chromosomes in each daughter cell again align on a metaphase plate. The centromeres finally divide, and each sister chromatid moves to one of the poles of the spindle. The next phase is telophase , followed again by cytokinesis. The result of the entire process is four haploid cells in which parental chromosomes are randomly distributed.第二次核分裂开始于分裂中期，子细胞中染色体重新排列在赤道板上。着丝粒最终分离，每个姊妹染色单体分向两极。接着胞质分裂。产生4个单倍体，父母染色体随机分配。Asexual Versus Sexual ReproductionMitosis and meiosis, respectively, make simple cell division and sexual reproduction possible. Each means of passing on hereditary information has advantages. In asexual reproduction the parent organism gives rise to offspring that are genetic clones of the parent. The advantages of this type of reproduction are that it preserves the parent's successful genetic complement, requires little or no specialization of reproductive organs, and is more rapid than sexual reproduction. A major disadvantage of the asexual mode is that a single catastrophic event or disease may destroy an entire population of genetically identical organisms.
A prime benefit of sexual reproduction is that it provides genetic variability and a ready mechanism for the elimination of deleterious mutations. It also allows "new" gene forms to arise and spread through populations. 有丝分裂和减数分裂在传递遗传信息过程中各有优势。体细胞的繁殖就是父母本的克隆，其优势是保留了父母本的成功遗传信息，不需要特殊器官，比性复制快的多。但一个简单灾难性事件或疾病都可能摧毁一个细胞群体。性复制的优势是它提供了遗传可变性和现存排除有害突变的机制。也可以产生新的基因并在种群中蔓延。课后作业：第一篇阅读材料答案：1C,2B,3D,4B,5A,6D
After Twenty Years O'Henry 二十年以后 欧亨利 The policeman on the beat moved up the avenue impressively. The impressiveness was habitual and not for show, for spectators were few. The time was barely 10 o'clock at night, but chilly gusts of wind with a taste of rain in them had well nigh depeopled the streets. 一个执勤的警察正沿街巡逻，很认真，他一直都这样认真，并不是做给谁看的。差不多是晚上十点了，街上行人寥寥无几，冷风飕飕地吹着，有种雨水的味道。 Trying doors as he went, twirling his club with many intricate and artful movements, turning now and then to cast his watchful eye adown the pacific thoroughfare, the officer, with his stalwart form and slight swagger, made a fine picture of a guardian of the peace. The vicinity was one that kept early hours. Now and then you might see the lights of a cigar store or of an all-night lunch counter; but the majority of the doors belonged to business places that had long since been closed. 他灵巧地来回转着手里的警棍，每家每户都仔细查看，警觉的目光不时地投向安静的街道，这个警察，身材强壮，昂首阔步，俨然一个和平守护者。附近的街区睡得都早，偶尔能看见一个雪茄店或通宵餐馆还亮着灯，其他的店铺早就打烊了。 When about midway of a certain block the policeman suddenly slowed his walk. In the doorway of a darkened hardware store a man leaned, with an unlighted cigar in his mouth. As the policeman walked up to him the man spoke up quickly. 走到街区中间时，警察突然放慢了脚步，他看见五金店门口站着一个人，嘴里叼着雪茄，没点着，正向他走过去时，这个人立马开口说话了。 "It's all right, officer," he said, reassuringly. "I'm just waiting for a friend. It's an appointment made twenty years ago. Sounds a little funny to you, doesn't it Well, I'll explain if you'd like to make certain it's all straight. About that long ago there used to be a restaurant
Deems Taylor: The Monster 怪才他身材矮小，头却很大，与他的身材很不相称——是个满脸病容的矮子。他神经兮兮，有皮肤病，贴身穿比丝绸粗糙一点的任何衣服都会使他痛苦不堪。而且他还是个夸大妄想狂。他是个极其自负的怪人。除非事情与自己有关，否则他从来不屑对世界或世人瞧上一眼。对他来说，他不仅是世界上最重要的人物，而且在他眼里，他是惟一活在世界上的人。他认为自己是世界上最伟大的戏剧家之一、最伟大的思想家之一、最伟大的作曲家之一。听听他的谈话，仿佛他就是集莎士比亚、贝多芬、柏拉图三人于一身。想要听到他的高论十分容易，他是世上最能使人筋疲力竭的健谈者之一。同他度过一个夜晚，就是听他一个人滔滔不绝地说上一晚。有时，他才华横溢；有时，他又令人极其厌烦。但无论是妙趣横生还是枯燥无味，他的谈话只有一个主题：他自己，他自己的所思所为。他狂妄地认为自己总是正确的。任何人在最无足轻重的问题上露出丝毫的异议，都会激得他的强烈谴责。他可能会一连好几个小时滔滔不绝，千方百计地证明自己如何如何正确。有了这种使人耗尽心力的雄辩本事，听者最后都被他弄得头昏脑涨，耳朵发聋，为了图个清静，只好同意他的说法。他从来不会觉得，对于跟他接触的人来说，他和他的所作所为并不是使人产生强烈兴趣而为之倾倒的事情。他几乎对世间的任何领域都有自己的理
论，包括素食主义、戏剧、政治以及音乐。为了证实这些理论，他写小册子、写信、写书……文字成千上万，连篇累牍。他不仅写了，还出版了这些东西——所需费用通常由别人支付——而他会坐下来大声读给朋友和家人听，一读就是好几个小时。他写歌剧，但往往是刚有个故事梗概，他就邀请——或者更确切说是召集——一群朋友到家里，高声念给大家听。不是为了获得批评，而是为了获得称赞。整部剧的歌词写好后，朋友们还得再去听他高声朗读全剧。然后他就拿去发表，有时几年后才为歌词谱曲。他也像作曲家一样弹钢琴，但要多糟有多糟。然而，他却要坐在钢琴前，面对包括他那个时代最杰出的钢琴家在内的聚会人群，一小时接一小时地给他们演奏，不用说，都是他自己的作品。他有一副作曲家的嗓子，但他会把著名的歌唱家请到自己家里，为他们演唱自己的作品，还要扮演剧中所有的角色。他的情绪犹如六岁儿童，极易波动。心情不好时，他要么用力跺脚，口出狂言，要么陷入极度的忧郁，阴沉地说要去东方当和尚，了此残生。十分钟后，假如有什么事情使他高兴了，他就会冲出门去，绕着花园跑个不停，或者在沙发上跳上跳下或拿大顶。他会因爱犬死了而极度悲痛，也会残忍无情到使罗马皇帝也不寒而栗。他几乎没有丝毫责任感。他似乎不仅没有养活自己的能力，也从没想到过有这个义务。他深信这个世界应该给他一条活路。为了支持这一信念，他
A 高分子化学和高分子物理 UNIT 1 What are Polymer? 第一单元什么是高聚物？ What are polymers? For one thing, they are complex and giant molecules and are different from low molecular weight compounds like, say, common salt. To contrast the difference, the molecular weight of common salt is only 58.5, while that of a polymer can be as high as several hundred thousand, even more than thousand thousands. These big molecules or ‘macro-molecules’are made up of much smaller molecules, can be of one or more chemical compounds. To illustrate, imagine that a set of rings has the same size and is made of the same material. When these things are interlinked, the chain formed can be considered as representing a polymer from molecules of the same compound. Alternatively, individual rings could be of different sizes and materials, and interlinked to represent a polymer from molecules of different compounds. 什么是高聚物？首先，他们是合成物和大分子，而且不同于低分子化合物，譬如说普通的盐。与低分子化合物不同的是，普通盐的分子量仅仅是58.5，而高聚物的分子量高于105，甚至大于106。这些大分子或“高分子”由许多小分子组成。小分子相互结合形成大分子，大分子能够是一种或多种化合物。举例说明，想象一组大小相同并由相同的材料制成的环。当这些环相互连接起来，可以把形成的链看成是具有同种分子量化合物组成的高聚物。另一方面，独特的环可以大小不同、材料不同，相连接后形成具有不同分子量化合物组成的聚合物。 This interlinking of many units has given the polymer its name, poly meaning ‘many’and mer meaning ‘part’(in Greek). As an example, a gaseous compound called butadiene, with a molecular weight of 54, combines nearly 4000 times and gives a polymer known as polybutadiene (a synthetic rubber) with about 200 000molecular weight. The low molecular weight compounds from which the polymers form are known as monomers. The picture is simply as follows: 许多单元相连接给予了聚合物一个名称，poly意味着“多、聚、重复”，mer意味着“链节、基体”（希腊语中）。例如：称为丁二烯的气态化合物，分子量为54，化合将近4000次，得到分子量大约为200000被称作聚丁二烯（合成橡胶）的高聚物。形成高聚物的低分子化合物称为单体。下面简单地描述一下形成过程： butadiene + butadiene + ???+ butadiene--→polybutadiene (4 000 time) 丁二烯＋丁二烯＋…＋丁二烯——→聚丁二烯 （4000次） One can thus see how a substance (monomer) with as small a molecule weight as 54 grow to become a giant molecule (polymer) of (54×4 000≈)200 000 molecular weight. It is essentially the ‘giantness’of the size of the polymer molecule that makes its behavior different from that of a commonly known chemical compound such as benzene. Solid benzene, for instance, melts
Unit 1 Never Give In, Never, Never, Never Winston Churchill Almost a year has passed since I came down here at your Head Master's kind invitation in order to cheer myself and cheer the hearts of a few of my friends by singing some of our own songs. The ten months that have passed have seen very terrible catastrophic events in the world—ups and downs, misfortunes—but can anyone sitting here this afternoon, this October afternoon, not feel deeply thankful for what has happened in the time that has passed and for the very great improvement in the position of our country and of our home? Why, when I was here last time we were quite alone, desperately alone, and we had been so for five or six months. We were poorly armed. We are not so poorly armed today; but then we were very poorly armed. We had the unmeasured menace of the enemy and their air attack still beating upon us, and you yourselves had had experience of this attack; and I expect you are beginning to feel impatient that there has been this long lull with nothing particular turning up! But we must learn to be equally good at what is short and sharp and what is long and tough. It is generally said that the British are often better at the last. They do not expect to move from crisis to crisis; they do not always expect that each day will bring up some noble chance of war; but when they very slowly make up their minds that the thing has to be done and the job put through and finished, then, even if it takes months—if it takes years—they do it. Another lesson I think we may take, just throwing our minds back to our meeting here ten months ago and now, is that appearances are often very deceptive, and as Kipling well says, we must "... meet with Triumph and Disaster. And treat those two impostors just the same." You cannot tell from appearances how things will go. Sometimes imagination makes things out far worse than they are; yet without imagination not much can be done. Those people who are imaginative see many more dangers than perhaps exist; certainly many more will happen; but then they must also pray to be given that extra courage to carry this far-reaching imagination. But for everyone, surely, what we have gone through in this period—I am addressing myself to the school—surely from this period of ten months this is the lesson: never give in, never give in, never, never, never, never—in nothing, great or small, large or petty—never give in except to convictions of honour and good
UNIT 2 英国人的谨慎和礼貌 在许多人看来，英国人极为礼貌，同他们交朋友很难。但愿下列文字能够帮助你更好地了解英国人的性格特点。 对于其他欧洲人来说，英国人最著名的特点是“谨慎”。一个谨慎的人不太会和陌生人聊天，不会流露出太多的情感，并且很少会兴奋。要了解一个谨慎的人并非易事；他从不告诉你有关他自己的任何事，也许你和他工作了几年，却连他住在哪儿，有几个孩子，兴趣是什么，都不知道。英国人就有类似的倾向。如果乘公共汽车去旅行，他们会尽量找一个没人坐的位子；如果是乘火车，他们会找一个没人的单间。如果他们不得不与陌生人共用一个单间时，那么即使火车驶出了很多英里，他们也不会开口交谈。一旦谈起来的话，他们不会轻易问及像“你几岁？”或者甚至“你叫什么名字？”等私人问题。像“你的手表是在哪儿买的？”或者“你的收入是多少？”这样的问题几乎不可想象。同样，在英国，人们交谈时一般声音都很轻、很有节制，大声谈话会被视为没有教养。 在某种程度上，不愿意与他人交流是一种不幸的品质，因为它可能会给人造成态度冷淡的印象。而事实上，英国人（也许除了北方人）并不以慷慨和好客而著称。而另一方面，虽然谨慎使他们不易与人沟通,但他们内心还是很有人情味的。如果一个陌生人或外国人友善地将这种隔阂打破那么一会儿，他们可能会满心欢喜。 与英国人的谨慎紧密相连的品质是英国式的谦逊。在内心深处，英国人可能比任何人都高傲，但是当他们与别人相处时，他们十分看重谦逊的品质，至少要表现出谦虚的样子。自我标榜会被认为没有教养。让我们假设，有一个人非常擅长打网球，但如果有人问他是否是个优秀选手时，他很少会说“是”，不然，人们会认为他很高傲。他可能会作出类似这样的回答，“不算太差，”或者“嗯，我非常喜欢网球。”这样的自我贬低是典型的英国式的。而且当这一品质与他们的谨慎混合在一起时，常常形成一种漠然的气氛，这在外国人看来难于理解，甚至令人恼火。 著名的英国人的幽默感也是大同小异。它的出发点是自我贬低，它的最大对手是高傲，它的理想境界是自嘲的能力——嘲笑自己的错误、自己的失败和窘境，甚至自己的理想。在英国，人们非常看重幽默感，常常能听到“他一点幽默感都没有”这样的批评。幽默感是一种对生活的态度而并非仅仅是开玩笑的能力。这种态度决非残酷、不敬或是怀有恶意的。英国人不会嘲笑一个跛子或者疯子，也不会嘲笑一个悲剧或者一次可敬的失败。同情心或者对艺术技巧的崇敬比嘲笑的份量重得多。 同幽默感一样，运动员精神是英国式的理想，这一点并非所有的英国人都做得到。必须认识到，现代形式的运动几乎都是英国人发明的。拳击、英式足球、网球以及板球都是在英国首次组织并且制定出规则的。规则是运动的精髓，运动员精神是指按照规则从事体育运动的能力，同时也表现在对对手的慷慨大度，以及失败后的良好心态。此外，运动员精神作为一种理想模式也普遍适用于日常生活。其中最基本的生活规则之一就是“不打跌倒的人”。换言之，就是不要利用别人的不幸。英国的男孩子常常在相互交往中把这种运动员精神表现得淋漓尽致。 英国人的另一特点就是礼貌。总的来说，英国式的礼貌习惯都不很正式。所有的礼貌都是建立在这样的基本原则之上：为别人着想，同时也认可别人对你的关心。在麻烦别人时，如：从某人前面经过，或者打断某人的谈话，或者向陌生人请教问题时，要先说“对不起”，为给对方带来的不便预先道歉。“抱歉”一词表示对意外打扰或者违反礼仪的歉意。如果有人提出或者暗示某个要求，如：“我可以借你的钢笔吗嘛？”或者“现在几点了？”或者“还有七码的鞋吗？”，而你无法满足这种要求时，也要说“抱歉”而不是“不”。“请原谅？”是用来要求别人重复所说内容时的礼貌说法。在英国，除了在学校，人们在请求发言时，不再用“请”这个词。在国外非常普遍的词组“不，请”，在英国本土听起来却会很别扭。“好
高分子专业英语课文翻译 高分子专业英语选讲课文翻译资料 A 高分子化学和高分子物理 UNIT 1 What are Polymer? 第一单元什么是高聚物, What are polymers? For one thing, they are complex and giant molecules and 什么是高聚物, 首先，他们是合成物和大分子，而且不同于低分子化合物，譬are different from low molecular weight compounds like, say, common salt. To 如说普通的盐。 contrast the difference, the molecular weight of common salt is only 58.5, while 与低分子化合物不同的是，普通盐的分子量仅仅是58.5， that of a polymer can be as high as several hundred thousand, even more than thousand 而高聚物的分子量高于105，甚至大于106。 thousands. These big molecules or ‘macro-molecules’ are made up of much smaller 这些大分子或“高分子”由许多小分子组成, 小分子相互结合形成大分子，molecules, can be of one or more chemical compounds. To illustrate, imagine that 大分子能够是一种或多种化合物。举例说明， a set of rings has the same size and is made of the same material. When these things 想象一组大小相同并由相同的材料制成的环。当这些环相互连接are
人教版高中英语必修四Unit 4课文翻译 Unit 4 Body language ―Reading― COMMUNICATION: NO PROBLEM? 交际：没有问题了吗? Yesterday, another student and I, representing our university's student association, went to the Capital International Airport to meet this year's international students. 昨天，我和另一个学生代表我们学校的学生会，到首都国际机场迎接今年的留学生。They were coming to study at Beijing University. We would take them first to their dormitories and then to the student canteen. 他们来北京大学学习。我们会首先把他们带到宿舍，然后去学生食堂。After half an hour of waiting for their flight to arrive, I saw several young people enter the waiting area looking around curiously. 在等了半个小时之后，我看见几个年轻人走进了等候区，好奇地向四周张望。I stood for a minute watching them and then went to greet them. 站着观察了他们一分钟后，我便走过去跟他们打招呼。 The first person to arrive was Tony Garcia from Colombia, closely followed by Julia Smith from Britain. 第一个到达的是从哥伦比亚来的托尼?加西亚，随后紧跟着的是英国的朱莉娅?史密斯。After I met them and then introduced them to each other, I was very surprised. 在与他们碰面并介绍他们彼此认识之后，我(对看到的情景)感到很吃惊。
Frankenstein's Monster Part 1 The story of Frankenstein Frankenstein is a young scientist/ from Geneva, in Switzerland. While studying at university, he discovers the secret of how to give life/ to lifeless matter. Using bones from dead bodies, he creates a creature/ that resembles a human being/ and gives it life. The creature, which is unusually large/ and strong, is extremely ugly, and terrifies all those/ who see it. However, the monster, who has learnt to speak, is intelligent/ and has human emotions. Lonely and unhappy, he begins to hate his creator, Frankenstein. When Frankenstein refuses to create a wife/ for him, the monster murders Frankenstein's brother, his best friend Clerval, and finally, Frankenstein's wife Elizabeth. The scientist chases the creature/ to the Arctic/ in order to destroy him, but he dies there. At the end of the story, the monster disappears into the ice/ and snow/ to end his own life. Part 2 Extract from Frankenstein It was on a cold November night/ that I saw my creation/ for the first time. Feeling very anxious, I prepared the equipment/ that would give life/ to the thing/ that lay at my feet. It was already one/ in the morning/ and the rain/ fell against the window. My candle was almost burnt out when, by its tiny light，I saw the yellow eye of the creature open. It breathed hard, and moved its arms and legs. How can I describe my emotions/ when I saw this happen? How can I describe the monster who I had worked/ so hard/ to create? I had tried to make him beautiful. Beautiful! He was the ugliest thing/ I had ever seen! You could see the veins/ beneath his yellow skin. His hair was black/ and his teeth were white. But these things contrasted horribly with his yellow eyes, his wrinkled yellow skin and black lips. I had worked/ for nearly two years/ with one aim only, to give life to a lifeless body. For this/ I had not slept, I had destroyed my health. I had wanted it more than anything/ in the world. But now/ I had finished, the beauty of the dream vanished, and horror and disgust/ filled my heart. Now/ my only thoughts were, "I wish I had not created this creature, I wish I was on the other side of the world, I wish I could disappear!” When he turned to look at me, I felt unable to stay in the same room as him. I rushed out, and /for a long time/ I walked up and down my bedroom. At last/ I threw myself on the bed/ in my clothes, trying to find a few moments of sleep. But although I slept, I had terrible dreams. I dreamt I saw my fiancée/ walking in the streets of our town. She looked well/ and happy/ but as I kissed her lips，they became pale, as if she were dead. Her face changed and I thought/ I held the body of my dead mother/ in my arms. I woke, shaking with fear. At that same moment，I saw the creature/ that I had created. He was standing/by my bed/ and watching me. His
UNIT 1 What Are Polymers? 第一单元什么是高聚物？ 什么是高聚物？首先，他们是络合物和大分子，而且不同于低分子化合物，譬如说普通的盐。与低分子化合物不同的是，普通盐的分子量仅仅是58.5，而高聚物的分子量高于105，甚至大于106。这些大分子或“高分子”由许多小分子组成。小分子相互结合形成大分子，大分子能够是一种或多种化合物。举例说明，想象一组大小相同并由相同的材料制成的环。当这些环相互连接起来，可以把形成的链看成是具有同种（分子量）化合物组成的高聚物。另一方面，独立的环可以大小不同、材料不同，相连接后形成具有不同(分子量)化合物组成的聚合物。 许多单元相连接给予了聚合物一个名称，poly意味着“多、聚、重复”，mer意味着“链节、基体”（希腊语中）。例如：称为丁二烯的气态化合物，分子量为54，化合将近4000次，得到分子量大约为200000被称作聚丁二烯（合成橡胶）的高聚物。形成高聚物的低分子化合物称为单体。下面简单地描述一下形成过程： 丁二烯＋丁二烯＋…＋丁二烯——→聚丁二烯 （4000次） 因而能够看到分子量仅为54的小分子物质（单体）如何逐渐形成分子量为200000的大分子（高聚物）。实质上，正是由于聚合物的巨大的分子尺寸才使其性能不同于像苯这样的一般化合物(的性能)。1例如，固态苯，在5.5℃熔融成液态苯，进一步加热，煮沸成气态苯。与这类简单化合物明确的行为相比，像聚乙烯这样的聚合物不能在某一特定的温度快速地熔融成纯净的液体。而聚合物变得越来越软，最终，变成十分粘稠的聚合物熔融体。将这种热而粘稠的聚合物熔融体进一步加热，不会转变成各种气体，但它不再是聚乙烯（如图1.1）。 固态苯——→液态苯——→气态苯 加热，5.5℃加热，80℃ 固体聚乙烯——→熔化的聚乙烯——→各种分解产物-但不是聚乙烯 加热加热 图1.1 低分子量化合物（苯）和聚合物（聚乙烯）受热后的不同行为发现另一种不同的聚合物行为和低分子量化合物行为是关于溶解过程。例如，让我们研究一下，将氯化钠慢慢地添加到固定量的水中。盐，代表一种低分子量化合物，在水中达到点（叫饱和点）溶解，但，此后，进一步添加盐不进入溶液中却沉到底部而保持原有的固体状态。饱和盐溶液的粘度与水的粘度不是十分不同，但是，如果我们用聚合物替代，譬如说，将聚乙烯醇添加到固定量的水中，聚合物不是马上进入到溶液中。聚乙烯醇颗粒首先吸水溶胀，发生形变，经过很长的时间以后，（聚乙烯醇分子）进入到溶液中。2同样地，我们可以将大量的聚合物加入到同样量的水中，不存在饱和点。将越来越多的聚合物加入水中，认为聚合物溶解的时间明显地增加，最终呈现柔软像面团一样粘稠的混合物。另一个特点是，在水中聚乙烯醇不会像过量的氯化钠在饱和盐溶液中那样能保持其初始的粉末状态。3总之，我们可以讲（1）聚乙烯醇的溶解需要很长时间，（2）不存在饱和点，（3）粘度的增加是典 型聚合物溶于溶液中的特性，这些特性主要归因于聚合物大分子的尺寸。 如图1.2说明了低分子量化合物和聚合物的溶解行为。 氯化钠晶体加入到水中→晶体进入到溶液中.溶液的粘度不是十分不同于充分搅拌 水的粘度→形成饱和溶液.剩余的晶体维持不溶解状态.加入更多的晶体并搅拌氯化钠的溶 解 聚乙烯醇碎片加入到水中→碎片开始溶胀→碎片慢慢地进入到溶液中允许维持现状 充分搅拌→形成粘稠的聚合物溶液.溶液粘度十分高于水的粘度继续搅拌聚合物的溶解
Unit4 无子女家庭：违背十万年来的繁衍规律 课文翻译： 二十好几的凯茜、韦恩夫妇结婚已有五年之久，没有孩子。上次凯茜娘家有人问：“你们打算什么时候要孩子，组成一个家庭呢?”她答道：“我们已经是个家庭啦!” 凯茜与韦恩属于决定不要孩子的年轻已婚夫妇群体，其人数正在日益增长。最近一项调查显示在过去的五年中，年龄在25至29岁之间妇女不愿生养的百分比几乎翻了一番，在18至24岁的已婚妇女中几乎增至三倍。在这个似乎大胆反抗生物性和社会性的决定后面隐藏着什么原因呢? 或许最能公开坦陈心曲的无子女夫妇是《婴儿陷阱》一书的作者：埃伦，派克，其夫威廉，一位广告总经理兼全国不生养夫妇协会主席。派克夫妇认为他们和协会均无意反对生儿育女，不过是反对不管人们是否愿意和需要孩子就迫使人们传宗接代的社会压力。 “这是一种生活方式的选择，”埃伦说，“我们选择自由和自愿，清净和闲暇。这也是一个朝哪个方向付出努力的问题——在你自己的小家庭之内或在一个大的社团之中。这一代人面临有关地球生命延续的严重问题以及生命质量的问题。我们的孙辈也许将购票去观赏最后一批红杉或排队去获取氧气配给。有人抱怨在回到有五个孩子的家途中被交通堵塞困住好几个小时，但是他们不能将孩子与交通堵塞联系起来。在一个受到人口过剩一系列后果威胁的世界上，我们正在参与一项事业使膝下无子的生活模式为社会所接受并受世人尊重。太多的孩子作为一种文化强制的后果而呱呱坠地，离婚和虐待儿童的相关统计充分揭露了这一结果。” 埃伦的丈夫补充说：“每位朋友、亲戚、同事不停地给你施加压力，劝你要孩子，说什么‘发现你生活中失去的东西’。好多好多人很晚才发现，所谓他们失去的东西其实是他们完全不适合做的事情。” 埃伦还说：“从抱第一个洋娃娃开始，大到欣赏电视肥皂剧，成年后参加鸡尾酒会，无形之中，总有一种压力要你为人父母。但是让我们来看看养育失败的比率吧，或许天下父母应该视为像当医生一样的专门职业。有些人擅长此道，他们应当生养孩子；有些人一窍不通，他们应该认为他们还有其他的选择。” 专业观察家同意这一看法：很多人生养孩子没有正当的理由，有时候则完全没有理由。男人常常稀里糊涂就当上了父亲，根本就没有作出审慎的选择；对许多妇女来说，怀孕能够成为一种方式来逃避不可解决的冲突，譬如，迅速获得名分，或改进自己的不良形象，以及满足童年时代未曾得到的关注和关爱的需要。 我与许多人类行为领域的专家交谈，探讨为什么那么多年轻夫妇决定不要孩子，他们的看法也是众说纷纭。一位家庭治疗专家把不要孩子的决定描写为“对当今世界形势基本的本能反应”，暗示像动物群居本能那样的东西正在起作用，来应对人口过剩、城市拥挤、环境污染与核战争危险。群居本能促使妇女感到繁殖人口有违心愿，并指引她们去寻找在家庭生活之外实现自我价值的新方式。 不止一位精神病医生暗示，凡是不愿生育的人有都自恋癖——觉得自己心甘情愿迫不得已，为照顾别人与受人照顾这个互相对立的内心冲突自圆其说。有位精神病医生说：“这些人不能容忍照顾孩子的想法，他们没有多余的爱分享给孩子，”并补充道，“你们这是对亘古以来人类繁衍生生不息的离经叛道。”他的另一位同事插话说：“情有可原嘛，我们谁不想为我们的欠缺找理由? 且不论他
UNIT14 你怎么知道艺术品的优劣? 玛丽亚·曼尼丝 你喜欢艺术吗？你能说出哪些艺术品好哪些不好？是否存在评价艺术的标准？读一读下面这篇文章，看看玛丽亚·曼尼丝如何回答这样的问题。 设想没有评论家告诉我们，对一幅画，一个剧本或一段新乐曲怎样反应。设想我们无意间步入一个未署名油画的画展。我们依据什么标准，依据什么价值来评判它们是优是劣，是天才的还是没有天才的，是成功还是失败?我们又怎能知道自己的想法是正确的? 近十五或二十年来，艺术的批评与欣赏流行否认任何合理标准的存在，使“好”与“坏”成了无关紧要，无足轻重、无可适用的字眼。我们被告知，根本不存在先通过知识与经验获得，然后加在讨论的对象上的一套标准这回事。这一直是受到欢迎的方法，因为它解除了评论家评判的责任，公众也无须知识。它迎合那些不愿受规则约束的人，称头脑空虚者为开明来讨好他们，并使不知所措的人得到安慰。在民主平等之旗的掩护下--当然不是我们祖先所说的那种平等--它实际是在说：“你是谁，要来告诉我们什么是好，什么是坏?”这与大众传媒制作者的一贯伎俩如出一辙。他们坚持认为，由公众而不是由他们决定的它想要听和看的什么，而评论家说这个节目好而这个节目不好，这纯粹是个人趣味的反应。没有谁表达这一哲学，比近来弗兰克·斯丹坦博士，哥伦比亚广播电视公司极其睿智的总裁更为简明。在联邦通讯委员会的一次听证会上，他在接受询问时漏出此言：“一人眼里的平庸之作，却是另一人的佳作。” 最妙不过的说法是：“没有一个标准是绝对的”。造成这种放任观念的另一重要因素是：畏惧感----所有艺术形式的观察者们都有唯恐猜错的担心。这种担心极易遇到，谁没有听说当初饱受世人指摘的艺术家后来被称为大师？每个时期都有一些评判者，他们不和时代一起前进，无法区分进化和革命，风行一时的时尚、业余的实验与深刻的必然的变化之间的区别。谁愿意作出这样严重的判断错误而贻笑大方?安全得多，当然也容易得多的做法是：看着一幅画，一个剧本或一首诗，说道：“它很难懂，但也许很好”；或者干脆把它当作新形式加以欢迎。“新的”这个词--尤其在我们这个国度--具有魔力般的涵义。凡是新的都是好的；而旧的则极可能是不好的。如果评论家能用无人理解的语言描述新事物，那么他就更为安全。倘若他掌握了说话的艺术，用精巧复杂的言辞，却什么也没说，日后就无人能够说他曾经说过什么。 但是我认为，所有这一切实质上都是对评判责任的背弃。艺术家在创作中表现自己，而你则在欣赏中有自己的承诺。毕竟还是观众成就了艺术。欣赏的气氛对于艺术的繁荣不可或缺。公众的期望愈高，艺术家的表现就愈好。相反，只有被评论家误导的社会，才会在这几年把既不是艺术也不是文学的东西当做艺术和文学接受。如果一件东西没有了，一切也就没有了，而在废物堆最底层的是被抛弃的标准。 但这些标准究竟是什么?你怎样得到它们?你如何知道它们是正确的?你又如何能在这许多不可捉摸的东西，包括最不可捉摸的自我本身，理清出一个清晰的模式? 首先，很明显，你愈是多读、多看、多听，你将愈好地被装备起来实践建立在所有的理解与判断之上的联想艺术。愈是见多识广，愈能深刻意识到一个连贯一致的规律--犹如星辰、潮汐、呼吸、白昼黑夜一般具有普遍性--存在于万事万物中。我把这一规律与这一节奏称为一种秩序。并非秩序，而是一种秩序。其中存在着变化万千的各种形式。其外则是混乱--疯狂的毁灭因素----病态。最终应由你来区分健康的多样性与病态的混乱，而不运用联想的过程是无法做到的。没有联想的过程，你就不能将莫扎特乐曲的一节和维米尔油画的一角，斯特拉文斯基的乐谱与毕加索的抽象画，或者一个挑衅性的行为与弗兰茨·克兰的油画，一阵咳嗽声与约翰·凯奇的作品联系起来。 某些艺术表现形式是永恒的，而另一些却转瞬即逝，这并非偶然现象。尽管你不一定总要解释原因，但你可以提出问题。艺术家说了些什么永恒的东西?他怎样说这些?有多少是时尚，多少纯是反映?为什么如今沃尔特·司各特的作品如此难读，而简·奥斯丁却不是这样?为什么巴洛克艺术风格适合某一时期，而另一时期却显得过于炫目辉煌? 是否存在一个技巧标准，能够适用于所有时代的艺术，还是每个时代对标准都有各自不同的定义?你也许已不经意地意识到，这些年“技巧”已变成不入流的字眼，因为它含有“标准”的意思--即作品完成得好不好。这种方便的逃避的结果，导致了大量不能发出声音的演员，不会解释歌曲涵义的歌手，不能交流感情的诗人，词汇贫乏的作家--更不用说不会作画的画家。现在的教条是，技巧阻碍表达。不必说你不知道自己在做什么，如果你不知道怎样去做，那么你就能做得更好。 我认为，到了你帮助扭转这一潮流的时候了，方法是努力重新发现技巧：掌握选择的工具，无论是画笔、字词还是声音。当你开始觉察自由与草率，严肃的实验与自我疗法，技艺与即兴，力量与暴力之间的区别时，你就逐渐能够将山羊与绵羊区分开来，而这种区分形式我们竟阔别已久。所有你需要重新拥有的，不过是几条标准和能够看穿骗局的盖氏测量仪，而我们可以在急切需要这两者的领域－－当代绘画开始艺术之旅。 我不知道什么更糟糕：不得不面对大面积的拙劣艺术，为的是发现些许可取之处，还是阅读评论家对此说的一切。其他任何一个表现领域都不会象画界一样如此盛行煞有其事的言谈，流行如此多的废话：艺术与艺术生存的评论氛围之间紧密地相互依赖的进一步证据。我将很乐意和你共享我们时代典型的故弄玄虚的东西。